U.S. patent application number 13/337841 was filed with the patent office on 2012-06-28 for method for location determination of wireless device.
This patent application is currently assigned to LG Innotek Co., Ltd.. Invention is credited to Jeonghoon Cho.
Application Number | 20120165042 13/337841 |
Document ID | / |
Family ID | 46317792 |
Filed Date | 2012-06-28 |
United States Patent
Application |
20120165042 |
Kind Code |
A1 |
Cho; Jeonghoon |
June 28, 2012 |
Method For Location Determination of Wireless Device
Abstract
A method for location determination of a wireless device is
disclosed, the method is performed by the wireless device mounted
with a gyroscope sensor and receiving position information from
artificial satellites, and a positioning period is adaptively
adjusted based on degree of mobility of the wireless device using
the position information received from GPS and a gyroscope sensor
embedded in the wireless device.
Inventors: |
Cho; Jeonghoon; (Seoul,
KR) |
Assignee: |
LG Innotek Co., Ltd.
Seoul
KR
|
Family ID: |
46317792 |
Appl. No.: |
13/337841 |
Filed: |
December 27, 2011 |
Current U.S.
Class: |
455/456.1 |
Current CPC
Class: |
G01S 19/49 20130101;
Y02D 30/70 20200801; Y02D 70/10 20180101; G01C 21/20 20130101; G01C
21/165 20130101 |
Class at
Publication: |
455/456.1 |
International
Class: |
H04W 24/00 20090101
H04W024/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 27, 2010 |
KR |
10-2010-0135546 |
Claims
1. A method for location determination of a wireless device, the
method performed by the wireless device mounted with a gyroscope
sensor and receiving position information from GPS, the method
comprising: (a) determining a position of a wireless device using
the position information received from the GPS; (b) grasping a
mobile acceleration of the wireless device using the gyroscope
sensor if the device is located in the center of a city, and
comparing a predetermined first reference acceleration with the
mobile acceleration to update a positioning period of the device
based on the comparative result; and (c) grasping a mobile
acceleration of the wireless device using the gyroscope sensor if
the device is located in the suburbs, and comparing a predetermined
second reference acceleration with the mobile acceleration to
update a positioning period of the device based on the comparative
result.
2. The method of claim 1, further including (d) determining whether
the device is located in the center of the city or in the
suburbs.
3. The method of claim 2, wherein the step (d) includes
determination using at least one of the numbers of base stations,
cell radius and intensity of transmission signal from the base
station.
4. The method of claim 3, wherein the step (d) includes determining
that the device is located in the center of the city if the numbers
of base stations are larger than the predetermined reference
numbers, and a cell radius is smaller than a reference radius, and
determining that the device is located in the suburbs if the
intensity of transmission signal from the base station is higher
than a reference intensity.
5. The method of claim 1, wherein the step (b) includes (e)
calculating a mobile acceleration of the wireless device, (f)
determining whether a measured mobile acceleration is greater than
the first reference acceleration, (g) lengthening the positioning
period if it is determined that the measured mobile acceleration is
smaller than the first reference acceleration, and (h) shortening
the positioning period if it is determined that the measured mobile
acceleration is greater than the first reference acceleration, and
performing the step (a), following the completion of steps (g) and
(h).
6. The method of claim 1, wherein the step (c) includes (i)
calculating a mobile acceleration of the wireless device, (j)
determining whether the measured mobile acceleration is greater
than the second reference acceleration, (k) lengthening the
positioning period if it is determined that the measured mobile
acceleration is smaller than the second reference acceleration, and
(l) shortening the positioning period if it is determined that the
measured mobile acceleration is greater than the second reference
acceleration, and performing the step (a), following the completion
of steps (k) and (l).
7. The method of claim 6, wherein the first reference acceleration
is smaller than the second reference acceleration.
8. The method of claim 5, wherein the calculation of the mobile
acceleration is performed by the gyroscope.
9. The method of claim 1, wherein the step (a) is performed on top
priority base if a user of the wireless device instructs the
positioning.
10. A method for location determination of a wireless device, the
method performed by the wireless device mounted with a gyroscope
sensor and receiving position information from GPS, the method
comprising: (a) determining a position of a wireless device using
the position information received from the GPS; and (b) grasping a
mobile acceleration of the wireless device using the gyroscope
sensor, and comparing a predetermined reference acceleration with
the mobile acceleration to update a positioning period of the
device based on the comparative result.
11. The method of claim 10, wherein the step (b) includes (c)
calculating a mobile acceleration of the wireless device, (d)
determining whether a measured mobile acceleration is greater than
the reference acceleration, (e) lengthening the positioning period
if it is determined that the measured mobile acceleration is
smaller than the reference acceleration, and (f) shortening the
positioning period if it is determined that the measured mobile
acceleration is greater than the reference acceleration, and
performing the step (a), following the completion of steps (e) and
(f).
12. The method of claim 11, wherein the calculation of the mobile
acceleration is performed by the gyroscope.
13. The method of claim 10, wherein the step (a) is performed on
top priority base if a user of the wireless device instructs the
positioning.
14. The method of claim 6, wherein the calculation of the mobile
acceleration is performed by the gyroscope.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit under 35 U.S.C.
.sctn.119 of Korean Patent Application No. 10-2010-0135546, filed
Dec. 27, 2010, which is hereby incorporated by reference in its
entirety.
BACKGROUND
[0002] 1. Field of the Invention
[0003] Exemplary embodiments of the present disclosure may relate
to a method for location determination of wireless device, and more
particularly to a method for location determination of wireless
device for use in GPS (Global Positioning System).
[0004] 2. Description of the Related Art
[0005] A mobile communication system provides a location service
for supplying a location of a terminal to a certain entity
periodically or in response to a request, by including a relevant
functional part for calculating the location of the terminal in a
mobile communication network. Location based services (LBSs) refer
generally to services that provide information to a user in
relation to the location of the user.
[0006] That is, the LBSs are services in which a chip connected to
a base station or GPS is attached to a mobile terminal to receive a
variety of location-based services using location information about
a mobile terminal or a user that include position tracking
services, public safety services and position based information
services.
[0007] To be more specific, the location based services (LBSs)
refer generally to various services that provide information to a
user in relation to the location of the user based on position
information obtained through wired or wireless communication
networks, and may be largely categorized into two methods, that is,
a cell method using a mobile communication base station and a
method using a GPS
[0008] The cell method is disadvantageous due to difficulty in
locating an accurate position as position error range can be over
several kilometers, but advantageous due to easy location even to
an interior of a building or to a basement because of using a relay
system.
[0009] Satellite-based global positioning systems (GPS) can also be
used to determine the location of mobile terminals. GPS solutions
are generally more accurate (position error range being at most
less than several hundred meters) than cell of origin methods but
have restricted use when required to operate indoors where
reflection and refraction are easy, due to characteristics of
satellite signal.
BRIEF SUMMARY
[0010] The present disclosure is directed to solving the
disadvantages by providing a method for location determination of a
wireless device in which a positioning period is adaptively
adjusted based on degree of mobility of the wireless device using
position information received from GPS and a gyroscope sensor
embedded in the wireless device, if need be.
[0011] Technical subjects to be solved by the present disclosure
are not restricted to the above-mentioned description, and any
other technical problems not mentioned so far will be clearly
appreciated from the following description by the skilled in the
art.
[0012] In one general aspect of the present disclosure, there is
provided a method for location determination of a wireless device,
the method performed by the wireless device mounted with a
gyroscope sensor and receiving position information from GPS, the
method comprising: (a) determining a position of a wireless device
using the position information received from the GPS; (b) grasping
a mobile acceleration of the wireless device using the gyroscope
sensor if the device is located in the center of a city, and
comparing a predetermined first reference acceleration with the
mobile acceleration to update a positioning period of the device
based on the comparative result; and (c) grasping a mobile
acceleration of the wireless device using the gyroscope sensor if
the device is located in the suburbs, and comparing a predetermined
second reference acceleration with the mobile acceleration to
update a positioning period of the device based on the comparative
result.
[0013] Preferably, the method further includes (d) determining
whether the device is located in the center of the city or in the
suburbs.
[0014] Preferably, the step (d) includes determination using at
least one of the numbers of base stations, cell radius and
intensity of transmission signal from the base station.
[0015] Preferably, the step of (d) includes determining that the
device is located in the center of a city if the numbers of base
stations are larger than the predetermined reference numbers, and a
cell radius is smaller than a reference radius, and determining
that the device is located in the suburbs if the intensity of
transmission signal from the base station is higher than a
reference intensity.
[0016] Preferably, the step (b) includes (e) calculating a mobile
acceleration of the wireless device, (f) determining whether a
measured mobile acceleration is greater than the first reference
acceleration, (g) lengthening the positioning period if it is
determined that the measured mobile acceleration is smaller than
the first reference acceleration, and (h) shortening the
positioning period if it is determined that the measured mobile
acceleration is greater than the first reference acceleration, and
performing the step (a), following the completion of steps (g) and
(h).
[0017] Preferably, the step (c) includes (i) calculating a mobile
acceleration of the wireless device, (j) determining whether the
measured mobile acceleration is greater than the second reference
acceleration, (k) lengthening the positioning period if it is
determined that the measured mobile acceleration is smaller than
the second reference acceleration, and (l) shortening the
positioning period if it is determined that the measured mobile
acceleration is greater than the second reference acceleration, and
performing the step (a), following the completion of steps (k) and
(l).
[0018] Preferably, the first reference acceleration is smaller than
the second reference acceleration.
[0019] Preferably, the calculation of the mobile acceleration is
performed by the gyroscope.
[0020] Preferably, the step (a) is performed on top priority base
if a user of the wireless device instructs the positioning.
[0021] In another general aspect of the present disclosure, there
is provided a method for location determination of a wireless
device, the method performed by the wireless device mounted with a
gyroscope sensor and receiving position information from GPS, the
method comprising: (a) determining a position of a wireless device
using the position information received from the GPS; and (b)
grasping a mobile acceleration of the wireless device using the
gyroscope sensor, and comparing a predetermined reference
acceleration with the mobile acceleration to update a positioning
period of the device based on the comparative result.
[0022] Preferably, the step (b) includes (c) calculating a mobile
acceleration of the wireless device, (d) determining whether a
measured mobile acceleration is greater than the reference
acceleration, (e) lengthening the positioning period if it is
determined that the measured mobile acceleration is smaller than
the reference acceleration, and (f) shortening the positioning
period if it is determined that the measured mobile acceleration is
greater than the reference acceleration, and performing the step
(a), following the completion of steps (e) and (f).
[0023] Preferably, the calculation of the mobile acceleration is
performed by the gyroscope.
[0024] Preferably, the step (a) is performed on top priority base
if a user of the wireless device instructs the positioning.
[0025] Additional advantages, objects, and features of the
disclosure will be set forth in part in the description which
follows and in part will become apparent to those having ordinary
skill in the art upon examination of the following or may be
learned from practice of the disclosure. The objectives and other
advantages of the disclosure may be realized and attained by the
structure particularly pointed out in the written description and
claims hereof as well as the appended drawings.
[0026] It is to be understood that both the foregoing general
description and the following detailed description of the present
disclosure are exemplary and explanatory and are intended to
provide further explanation of the disclosure as claimed.
[0027] The method for location determination of a wireless device
according to the present disclosure has advantageous effects in
that large power-consuming network positioning and GPS positioning
periods are adaptively adjusted based on degrees of stationary and
mobility of the wireless device using a gyroscope sensor, whereby
an overall power consumed by the wireless device can be minimized
by minimally using a current consumed for positioning that uses a
large amount of power. As a result, the use time of the wireless
device can be considerably prolonged.
BRIEF DESCRIPTION OF THE DRAWING
[0028] Accompanying drawing is included to provide a further
understanding of arrangements and embodiments of the present
disclosure and is incorporated in and constitutes a part of this
application.
[0029] FIG. 1 is a signal flowchart of a method for location
determination of a wireless device according to the present
disclosure.
[0030] Additional advantages, objects, and features of the
disclosure will be set forth in part in the description which
follows and in part will become apparent to those having ordinary
skill in the art upon examination of the following or may be
learned from practice of the disclosure. The objectives and other
advantages of the disclosure may be realized and attained by the
method particularly pointed out in the written description and
claims hereof as well as the appended drawings.
DETAILED DESCRIPTION
[0031] Hereinafter, exemplary embodiments of the present disclosure
are described in detail with reference to the accompanying
drawings. It will be appreciated that for simplicity and/or clarity
of illustration, elements illustrated in the FIGURE have not
necessarily been drawn to scale. For example, the dimensions of
some of the elements may be exaggerated relative to other elements
for clarity. Further, if considered appropriate, reference numerals
have been repeated among the FIGURES to indicate corresponding
and/or analogous elements.
[0032] Particular terms may be defined to describe the disclosure
in the best mode as known by the inventors. Accordingly, the
meaning of specific terms or words used in the specification and
the claims should not be limited to the literal or commonly
employed sense, but should be construed in accordance with the
spirit and scope of the disclosure. The definitions of these terms
therefore may be determined based on the contents throughout the
specification.
[0033] In the following detailed description, numerous specific
details are set forth to provide a thorough understanding of
claimed subject matter. However, it will be understood by those
skilled in the art that claimed subject matter may be practiced
without these specific details. In other instances, well-known
methods, procedures, components and/or circuits have not been
described in detail.
[0034] The terms "first," "second," and the like, herein do not
denote any order, quantity, or importance, but rather are used to
distinguish one element from another, and the terms "a" and "an"
herein do not denote a limitation of quantity, but rather denote
the presence of at least one of the referenced item.
[0035] In the following description and/or claims, the terms
coupled and/or connected, along with their derivatives, may be
used. In particular embodiments, connected may be used to indicate
that two or more elements are in direct physical and/or electrical
contact with each other. Coupled may mean that two or more elements
are in direct physical and/or electrical contact. However, coupled
may also mean that two or more elements may not be in direct
contact with each other, but yet may still cooperate and/or
interact with each other. For example, "coupled" may mean that two
or more elements do not contact each other but are indirectly
joined together via another element or intermediate elements.
[0036] Furthermore, the term "and/or" may mean "and", it may mean
"or", it may mean "exclusive-or", it may mean "one", it may mean
"some, but not all", it may mean "neither", and/or it may mean
"both", although the scope of claimed subject matter is not limited
in this respect.
[0037] In the following description and/or claims, the terms
"comprise" and "include," along with their derivatives, may be used
and are intended as synonyms for each other. Furthermore, the terms
"including", "includes", "having", "has", "with", or variants
thereof are used in the detailed description and/or the claims to
denote non-exhaustive inclusion in a manner similar to the term
"comprising".
[0038] The core idea of the present disclosure is to accurately
recognize a position of a wireless device consuming less power, and
to this end, GPS positioning of standalone method is periodically
performed at normal times, and a mobility of the wireless device is
grasped using the gyroscope sensor to adjust a positioning period
based on the degree of mobility and to minimize a current consumed
for positioning, and a handset-based A-GPS scheme consuming a large
amount of power is minimally used in time of emergency.
[0039] Hereinafter, the description is made on a presumption that
the wireless device can directly receive position information from
satellites, and a gyroscope sensor is mounted on the wireless
device.
[0040] FIG. 1 is a signal flowchart of a method for location
determination of a wireless device according to the present
disclosure.
[0041] Referring to FIG. 1, the method 100 for location
determination of a wireless device according to the present
disclosure includes the steps of positioning 110, determining an
area to which the wireless device belongs 120, measuring a position
in a center of a city 130, and measuring a position in suburbs
140.
[0042] The positioning step 110 determines a position of a wireless
device using position information received from artificial
satellites.
[0043] The step of determining an area to which the wireless device
belongs 120 determines whether the wireless device is located in
the center of city or in the suburbs using at least one of the
numbers of base stations around the wireless device, cell radius
and intensity of transmission signal from the base station.
[0044] In a case the numbers of base stations around the wireless
device are larger than the numbers of predetermined references and
the cell radius is smaller than a reference radius, it is
determined that the wireless device is located in the center of the
city, and in a case the intensity of transmission signal from the
base station is higher than a reference strength, it is determined
that the wireless device is positioned in the suburbs.
[0045] The step of measuring a position in a center of a city 130
is operated, if it is determined (Yes) that the wireless device is
situated in the center of the city as a result of determination at
the step 120, and includes a mobility determination step 131, an
acceleration of the wireless device calculation step 132, an
acceleration comparison step 133, a first positioning period
adjusting step 134 and a second positioning period adjusting step
135.
[0046] The mobility determination step 131 determines the
stationary state or mobile state of the wireless device using the
gyroscope sensor. In a case the wireless device is determined to be
in the stationary state (No), flow keeps determining at a
predetermined time interval whether the wireless device is
moving.
[0047] The acceleration of the wireless device calculation step 132
calculates the mobile acceleration of the wireless device if it is
determined (Yes) that the wireless device moves as a result of the
determination at the mobility determination step 131, where the
mobility determination step 131 and the acceleration of the
wireless device calculation step 132 may be commonly called a
mobile acceleration measuring step, which is performed by the
gyroscope sensor.
[0048] The acceleration comparison step 133 determines whether the
calculated mobile acceleration of the wireless device is higher
than a first reference acceleration.
[0049] The first positioning period adjusting step 134 shortens the
positioning period to allow enabling an accurate positioning under
a situation where the wireless device is expected to move fast, if
it is determined (Yes) that the calculated mobile acceleration is
greater than the first reference acceleration as a result of
determination of the acceleration comparison step 133.
[0050] The second positioning period adjusting step 135 lengthens
the positioning period to allow reducing power consumed for
positioning, if it is determined (No) that the calculated mobile
acceleration is smaller than the first reference acceleration as a
result of determination of the acceleration comparison step
133.
[0051] The positioning step 110 is performed to update the position
of the wireless device, following the completion of the first
positioning period adjusting step 134. The positioning step 110 may
be performed to update the position of the wireless device, or the
wireless device may be kept at standby state whereby the current
consumed for the wireless device can be minimized, following the
completion of the second positioning period adjusting step 135.
[0052] The step of measuring a position in the suburbs 140 is
operated, if it is determined (No) that the wireless device is
situated in the suburbs as a result of determination at the step
120, and includes a mobility determination step 141, an
acceleration of the wireless device calculation step 142, an
acceleration comparison step 143, a third positioning period
adjusting step 144 and a fourth positioning period adjusting step
145.
[0053] The mobility determination step (141) determines the
stationary state or mobile state of the wireless device using the
gyroscope sensor. In a case the wireless device is determined to be
in the stationary state (No), flow keeps determining at a
predetermined time interval whether the wireless device is
moving.
[0054] The acceleration of the wireless device calculation step 142
calculates the mobile acceleration of the wireless device if it is
determined (Yes) that the wireless device moves as a result of the
determination at the mobility determination step 141, where the
mobility determination step 141 and the acceleration of the
wireless device calculation step 142 may be commonly called a
mobile acceleration measuring step, which is performed by the
gyroscope sensor.
[0055] The acceleration comparison step 143 determines whether the
calculated mobile acceleration of the wireless device is higher
than a second reference acceleration.
[0056] The third positioning period adjusting step 144 shortens the
positioning period to allow enabling an accurate positioning under
a situation where the wireless device is expected to move fast, if
it is determined (Yes) that the calculated mobile acceleration is
greater than the second reference acceleration as a result of
determination of the acceleration comparison step 143.
[0057] The fourth positioning period adjusting step 145 lengthens
the positioning period to allow reducing power consumed for
positioning, if it is determined (No) that the calculated mobile
acceleration is smaller than the second reference acceleration as a
result of determination of the acceleration comparison step
143.
[0058] The positioning step 110 is performed to update the position
of the wireless device, following the completion of the third
positioning period adjusting step 144. The positioning step 110 may
be performed to update the position of the wireless device, or the
wireless device may be kept at standby state whereby the current
consumed for the wireless device can be minimized, following the
completion of the fourth positioning period adjusting step 145.
[0059] At this time, the first reference acceleration is set to
smaller than the second reference acceleration. Although FIG. 1
includes the determination step 120, it should be apparent that the
step 120 may not be included.
[0060] The position of a wireless device has been forcibly measured
based on position measurement period according to the prior art,
and as a result, the method of receiving the position information
from the artificial satellites and determining the position of the
wireless device by communicating with the base station consumed
lots of power.
[0061] The use type of a wireless device depends on who owns the
wireless device.
[0062] For example, it is assumed that an owner of a wireless
device is an elementary school student. In a case the student acts
12 hours in a day, in consideration of commuting time and schedules
after school, the student stays in the school for 6 hours at the
minimum. Under this circumstance, measurement of position of the
wireless device at every predetermined time would be waste of
power. In this case, there would be no big problem even if the
measuring period of position of the wireless device is
lengthened.
[0063] Alternatively, if it is assumed that there occurs an
emergency where the owner of the wireless device is kidnapped, and
the wireless device is moving considerably faster than the normal
moving speed (mobile acceleration), it would be imperative that the
measuring period be shortened to secure an accurate measurement of
the wireless device. The present disclosure satisfies the above two
cases altogether.
INDUSTRIAL APPLICABILITY
[0064] Therefore, the method for location determination of a
wireless device according to the present disclosure has an
industrial applicability in that power consumption is relatively
lower than the predetermined period positioning method to increase
use efficiency of battery in case of need, because, the cell method
that consumes a lot of power is dispensed with in measuring the
position of a wireless device, and an embedded gyroscope sensor is
instead employed to grasp the mobility of the wireless device,
whereby the positioning period is adaptively adjusted based on the
mobility.
[0065] Another industrial applicability is that accuracy and
efficiency can be accomplished by preferentially receiving and
displaying the position information from satellites and by
inputting an instruction to the wireless device, if an owner of a
wireless device wants to know his or her accurate position.
[0066] The measuring a moving distance using a gyroscope sensor and
updating the position of wireless device is well known to the
skilled in the art, such that there is no further redundant
description thereto.
[0067] The above-mentioned method for location determination of a
wireless device according to the present disclosure may, however,
be embodied in many different forms and should not be construed as
limited to the embodiments set forth herein. Thus, it is intended
that embodiments of the present disclosure may cover the
modifications and variations of this disclosure provided they come
within the scope of the appended claims and their equivalents.
[0068] While particular features or aspects may have been disclosed
with respect to several embodiments, such features or aspects may
be selectively combined with one or more other features and/or
aspects of other embodiments as may be desired.
* * * * *